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David K


Last seen: 11 days ago Active since 2015

I spend a lot of time in MATLAB, with my focus on signal processing and data analysis.

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Unable to change default radio button in button group
I am building an app in appdesigner which contains a Radio Button Group. I recently decided to add a new radio button option to ...

2 months ago | 1 answer | 0

1

answer

Question


Parfor converting object to double?
I am trying to parallelize some of my code to make it run quicker and ran into a weird error that I get in 2019a but not in 2020...

8 months ago | 1 answer | 0

1

answer

Question


How to parallelize when loading lots of data
I have been struggling to speed up my MATLAB code which loads a number of large data files into custom class objects. My two cla...

8 months ago | 1 answer | 0

1

answer

Question


Major slowdown when clearing objects in the wrong order
I've built a set of custom classes that I use for accessing and analyzing our datasets. I've run into the problem that when I ru...

10 months ago | 0 answers | 0

0

answers

Question


How to disable title of ButtonGroup
I have an app I've created using App Designer. Included is a Button Group that I would like to Enable and Disable with a checkbo...

10 months ago | 1 answer | 0

1

answer

Question


Can I use arrows to move Data Tips on scatter plots?
I know that when using the plot function with data tips you can use the arrow keys to move the data tip through the data set. Is...

11 months ago | 2 answers | 0

2

answers

Question


Path not searching in current directory first
On my path I have a folder called "Other_Code" which contains "@myClass/myClass.m". In the directory I am running from I have a ...

1 year ago | 0 answers | 0

0

answers

Question


Any way to make a global wrapper code for all callbacks in App Designer?
I am in the process of migrating a GUI I created using GUIDE to App Designer (2019b). In GUIDE, I added code to the main functio...

1 year ago | 0 answers | 0

0

answers

Question


Add value limits to cells in uitable
I am creating a GUI using the App Designer (2019b). One of the nice features for NumericEditField is that you can define value l...

1 year ago | 0 answers | 0

0

answers

Question


Format ToolTip strings in AppDesigner
I am working on migrating a GUI from GUIDE to AppDesigner. In GUIDE, I could format the tooltip text by supplying an HTML string...

1 year ago | 1 answer | 0

1

answer

Question


Read text file with multiple rows of fields
I am trying to read in a large text file with a challenging formatting. Instead of one long row of many fields, the file is brok...

2 years ago | 1 answer | 0

1

answer

Question


"Error during serialization" when modifying plot created from custom classes
I have been running into the following error in a couple of different situations: Error using scribeccp. (Line 24) Error durin...

2 years ago | 0 answers | 0

0

answers

Question


Error when trying to remove object from plot
I have an axis containing multiple plotted objects, created both from the `scatter` and `plot` commands. If I want to remove one...

3 years ago | 0 answers | 0

0

answers

Question


How to handle empty strings with datenum
I have a comma-separated text file I am reading in and parsing using |textscan|. Two of the fields are the date and time of day....

4 years ago | 1 answer | 0

1

answer

Question


Is it possible to determine when I last used a toolbox?
It's coming time for me to renew my license, and I have a couple toolboxes that I rarely use, if at all. Is there a way to see w...

4 years ago | 3 answers | 0

3

answers

Question


Which functions require double precision
I recently got the following error: The input signal X must be a double-precision vector. Now, I understand the error an...

4 years ago | 1 answer | 0

1

answer

Question


Can I put a try-catch in GUI initialization code?
I am building a GUI using GUIDE in 2016a which I will be compiling and deploying. I want to try to do some global error handling...

4 years ago | 1 answer | 0

1

answer

Question


Force return from function while debugging
I am debugging a program and would like to return from a subfunction without completing the function. For example, you can write...

4 years ago | 1 answer | 0

1

answer

Question


Use individual license on a network
I have an individual license, which allows me to install and use MATLAB for one user on up to four different machines. One of th...

5 years ago | 1 answer | 0

1

answer

Question


Why does Matlab use 'log' instead of 'ln'?
Okay, I understand that the function for natural logarithm is "log()" and the function for base 10 logarithm is "log10". However...

6 years ago | 3 answers | 0

3

answers

Question


Use Parallel Toolbox to debug multiple scripts
I have two different scripts that I would like to debug simultaneously so I can compare their behavior. Is there a way I can use...

6 years ago | 1 answer | 0

1

answer

Question


Why is errorbar whisker length dependent on X?
I am running a simulation in Matlab 2015 which creates data each round, so I am plotting a number of single errorbar series indi...

6 years ago | 2 answers | 0

2

answers